Salsify
Tragopogon porrifolius
Also known asOyster plant · Vegetable oyster · Common salsify · Goatsbeard · Purple salsify
Environment
The bounded range this crop tolerates.
Climate and zones
- USDA zones
- 3–9 (winter low around -40°C)
- Frost
- very hardy (survives deep cold)
- Season
- cool (spring/fall)
Growing systems
Root mass: heavy. Thin-channel systems can't hold this crop.
Growing media
| Medium | pH effect | Retention | Bacterial surface |
|---|---|---|---|
| Soil-based mix (Potting soil) | varies | high | high |
Nutrient demand by stage
NPK ratios are relative weights. EC targets shift through the plant's life.
| Stage | N | P | K | EC (mS/cm) |
|---|---|---|---|---|
| seedling | 1 | 1 | 1 | 0.6 |
| vegetative | 1 | 1 | 2 | 1.3 |
Aquaponics suitability
Not recommended
Fish waste alone doesn't supply enough of what this crop demands. Grows in hybrid systems with supplemental dosing, but expect active management.
Care notes
A deep-rooted crop requiring 30 cm of loose, obstacle-free growing medium (similar to parsnip or long daikon). Media beds or very tall containers with fine-grained, stone-free substrate. EC 1.5-2.0 mS/cm. pH 6.0-7.0. Temperature: 12–22°C (cool-season). Moderate light (DLI 12-18 mol/m2/day). Long season: 110-130 days from seed. Direct seed (the taproot doesn't survive transplanting). Thin to 8–10 cm spacing. Seed viability declines quickly; use fresh seed. Harvest by loosening the media deeply and pulling the fragile root carefully (they snap easily). Process quickly after harvest: peel, drop immediately into acidulated water (water with lemon juice or vinegar) to prevent browning. For roasted salsify: toss peeled, cut pieces with olive oil, salt, and thyme, roast at 200°C until golden and caramelized. The flavor is delicate, sweet, and unlike any other common vegetable.